/Engine/Source/Editor/UnrealEd/Classes/Settings/LevelEditorViewportSettings.h
Settings that control the behavior of the "snap to surface" feature
struct FSnapToSurfaceSettings
bool
bEnabled
Whether snapping to surfaces in the world is enabled
bool
bSnapRotation
Whether objects should match the rotation of the surfaces they snap to
float
SnapOffsetExtent
The amount of offset to apply when snapping to surfaces